/*
 * Copyright 2025 LinQingYing. and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of this source code is governed by the Apache License 2.0,
 * which allows users to freely use, modify, and distribute the code,
 * provided they adhere to the terms of the license.
 *
 * The software is provided "as-is", and the authors are not responsible for
 * any damages or issues arising from its use.
 *
 */

package org.cangnova.cangjie.psi.psiUtil

import org.cangnova.cangjie.lexer.CjTokens
import org.cangnova.cangjie.psi.CjElement
import org.cangnova.cangjie.psi.CjExpression
import org.cangnova.cangjie.psi.CjLambdaExpression
import org.cangnova.cangjie.psi.CjParenthesizedExpression
import com.intellij.psi.PsiComment
import com.intellij.psi.PsiWhiteSpace
import com.intellij.psi.util.PsiTreeUtil

internal fun CjElement.deleteSemicolon() {
    val sibling = PsiTreeUtil.skipSiblingsForward(this, PsiWhiteSpace::class.java, PsiComment::class.java)
    if (sibling == null || sibling.node.elementType != CjTokens.SEMICOLON) return

    val lastSiblingToDelete = PsiTreeUtil.skipSiblingsForward(sibling, PsiWhiteSpace::class.java)?.prevSibling ?: sibling
    parent?.deleteChildRange(nextSibling, lastSiblingToDelete)
}
fun CjExpression.unpackFunctionLiteral(allowParentheses: Boolean = false): CjLambdaExpression? {
    return when (this) {
        is CjLambdaExpression -> this
//        is CjLabeledExpression -> baseExpression?.unpackFunctionLiteral(allowParentheses)
//        is CjAnnotatedExpression -> baseExpression?.unpackFunctionLiteral(allowParentheses)
        is CjParenthesizedExpression -> if (allowParentheses) expression?.unpackFunctionLiteral(allowParentheses) else null
        else -> null
    }
}
